import java.util.Scanner;

 class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            Data data = new Data(x, y);
            System.out.println(data.getX() + data.getY());
            scanner.close();
        }
    }

}

class Data {

    int x;
    int y;

     Data(int x, int y) {
        this.x = x;
        this.y = y;//形参名与变量名相同
    }

     public int getX() {
        return x;
    }

     public int getY() {
        return y;
    }

}